Mexico
Spain
United Kingdom
The Smart Way for
Japanese Travelers
to Stay Connected Abroad
Avoid expensive daily roaming fees from NTT Docomo, SoftBank, or au. Get instant 5G/4G internet anywhere with Cellesim eSIM.
💳 Pay securely with international cards. Your Japanese SIM stays active for PayPay, LINE, and Bank OTP verification.
Why Japanese Travelers Switch to eSIM
Before Boarding
Domestic roaming packages stop working or throttle speed the moment you land in Thailand, USA, or Taiwan
Local carriers charge up to ¥2,980 per day for international roaming packs with strict daily usage limits
Don't waste holiday time hunting for physical local SIM cards at airport booths and showing your passport
Pocket Wi-Fi is an extra device to charge and carry. Cellesim is 100% digital on your existing phone
Popular Plans for Japanese Travelers
Choose your destination and get connected instantly.
Cellesim vs. Japanese Carriers
Why pay for expensive NTT Docomo or SoftBank packs?
| Features | Cellesim eSIM | Docomo / SoftBank Roaming |
|---|---|---|
| Cost (10-Day Trip) | ~¥1,200 Total Pay only for what you use |
¥19,800 - ¥29,800+ High fixed daily fees |
| Japanese Number Active (+81) | ✓ Stays Active Receive Bank / LINE OTPs for Free |
Restricted Requires complex activation |
| PayPay / LINE / SMBC | ✓ Optimized Full 2FA SMS support |
Potential Delay Delayed SMS on foreign networks |
| Overage Control | 100% Prepaid Zero hidden bill shock |
Auto-Renewal Bills Charges continue daily |
Fair Comparison
Why Cellesim is the best choice for your journey
| Comparison | Cellesim | Airalo | Holafly |
|---|---|---|---|
| Hotspot Support | ✓ Supported Share with family |
Supported | ✕ Restricted Often No Hotspot allowed |
| Local Value (¥) | Best Local Rates Optimized for JP Market |
USD Standard | Expensive Daily Caps |
| Customer Support | ✓ Global Expert Travel Specialized |
Tickets | Chat |
How It Works
Choose Destination
Select the package that fits your itinerary from 200+ global options.
Install Before Departure
Scan the QR code and set up your profile using your home Wi-Fi in Japan.
Land & Connect
Land, switch data line to Cellesim, and you’re online instantly. No SIM swapping.
💡 Pro Tip: Install your eSIM 1–2 days before departure using your home or office Wi-Fi in Japan. Don’t wait until you land!
Smart Tools for Your Journey
Everything you need to prepare for a digital-first trip from Japan.
Is Cellesim Right for You?
Perfect if you:
- ✓ Traveling outside Japan (Thailand, Taiwan, USA, etc.)
- ✓ Use apps like PayPay, LINE, & Google Maps
- ✓ Want to avoid high daily roaming bill surprises
Not ideal if you:
- ✕ Your phone does not support eSIM technology
- ✕ Rely only on hotel Wi-Fi 24/7
Not sure if your phone supports eSIM?
Check compatibility here →Trusted by 50,000+ International Travelers
"Worked perfectly in Taipei. I could receive SMBC verification for my payments while having 5G data. Way cheaper than SoftBank's daily pack!"
"Way cheaper than roaming packs for Thailand. Used it for 10 days in Phuket, coverage was excellent. Saved over ¥15,000 compared to Docomo."
"Setup was so easy. Bought it in Tokyo, installed it at home, and was online the moment I landed in Hawaii. Perfect for keeping in touch."
Our Commitment
"We built Cellesim because roaming ruined our own trips. We wanted something simple and fair. That's why our eSIM experience is designed for travelers, with zero hidden surprises."
Frequently Asked Questions
For Japanese Travelers Abroad
Will my Japanese phone number stay active for LINE/PayPay? ↓
Can I still receive Bank OTP SMS? ↓
Is it cheaper than Docomo or SoftBank roaming packs? ↓
Can I share my internet (Hotspot) with others? ↓
Travel Smarter.
Stay Connected anywhere.
For Japanese travelers, an international eSIM is no longer optional — it’s the smartest way to save money and stay connected.